获取Windows正在运行的窗口进程

主要是获取Alt+Tab中展示的窗口

原理主要是获取窗口的样式来判断是否会在Alt+Tab中显示

具体代码如下

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///         /// Alt+Tab 应用         ///         ///         ///         public static bool IsAltTabWindow(IntPtr hWnd)         {             // The window must be visible             if (!IsWindowVisible(hWnd))                 return false;               // The window must be a root owner             if (GetAncestor(hWnd, GA_ROOTOWNER) != hWnd)                 return false;               // The window must not be cloaked by the shell             DwmGetWindowAttribute(hWnd, DwmWindowAttribute.DWMWA_CLOAKED, out int cloaked, sizeof(uint));             if (cloaked == DWM_CLOAKED_SHELL)                 return false;               // The window must not have the extended style WS_EX_TOOLWINDOW             int style = Utils.Win32Api.GetWindowLong(hWnd, GWL_EXSTYLE);             if ((style & WS_EX_TOOLWINDOW) != 0)                 return false;               return true;         }    [DllImport("User32.dll", CharSet = CharSet.Auto)]         public static extern bool IsWindowVisible(IntPtr hWnd);    [DllImport("user32.dll")]         public static extern IntPtr GetAncestor(IntPtr hWnd, uint gaFlags);  [DllImport("dwmapi.dll")]         public static extern int DwmGetWindowAttribute(IntPtr hwnd, DwmWindowAttribute dwAttribute, out int attrValue, int cbAttribute);   const uint DWM_CLOAKED_SHELL = 0x00000002;         const uint GA_ROOTOWNER = 3;           const uint WS_EX_TOPMOST = 0x00000008;     [Flags]     public enum DwmWindowAttribute : uint     {         DWMWA_NCRENDERING_ENABLED = 1,         DWMWA_NCRENDERING_POLICY,         DWMWA_TRANSITIONS_FORCEDISABLED,         DWMWA_ALLOW_NCPAINT,         DWMWA_CAPTION_BUTTON_BOUNDS,         DWMWA_NONCLIENT_RTL_LAYOUT,         DWMWA_FORCE_ICONIC_REPRESENTATION,         DWMWA_FLIP3D_POLICY,         DWMWA_EXTENDED_FRAME_BOUNDS,         DWMWA_HAS_ICONIC_BITMAP,         DWMWA_DISALLOW_PEEK,         DWMWA_EXCLUDED_FROM_PEEK,         DWMWA_CLOAK,         DWMWA_CLOAKED,         DWMWA_FREEZE_REPRESENTATION,         DWMWA_LAST     }  ///         /// 获取窗体句柄         ///         ///         ///         ///         [DllImport("user32.dll", EntryPoint = "GetWindowLongA", SetLastError = true)]         public static extern int GetWindowLong(IntPtr hwnd, int nIndex);   const int GWL_EXSTYLE = -20;//得到扩展的窗口风格     public const int WS_EX_TOOLWINDOW = 0x00000080;

　　以上方式对于全屏的UWP窗口时无法获取得到的，因此需要引入以下方式获取全屏UWP窗口

/// 

        /// 全屏的UWP应用
        /// 
        /// 
        /// 
        public  static  bool IsFullScreenUwpWindows(IntPtr hWnd)
        {
            // Get the extended style of the window
            var style = GetWindowLong(hWnd, GWL_EXSTYLE);

            // The window must have the extended style WS_EX_TOPMOST
            if ((style & WS_EX_TOPMOST) == 0)
                return false;

            // The window must not have the extended style WS_EX_NOACTIVATE
            if ((style & WS_EX_NOACTIVATE) != 0)
                return false;

            // The window must not have the extended style WS_EX_TOOLWINDOW
            if ((style & WS_EX_TOOLWINDOW) != 0)
                return false;

            return true;
        }

public const int WS_EX_NOACTIVATE = 0x08000000;

然后通过枚举窗口的方式就可以获取到所有窗口了

/// 

        /// 枚举窗体的回调
        /// 
        /// 
        /// 
        /// 
        public delegate bool EnumWindowsCallBack(IntPtr hwnd, IntPtr lParam);
        /// 

        /// 枚举出窗体
        /// 
        /// 
        /// 
        /// 
        [DllImport("user32")]
        public static extern int EnumWindows(EnumWindowsCallBack x, IntPtr y);

 /// 

        /// 枚举子窗口
        /// 
        /// 
        /// 
        /// 
        /// 
        [DllImport("user32")]
        public static extern int EnumChildWindows(IntPtr hWndParent, EnumWindowsCallBack x, IntPtr y);
 Liststring>> handles = new Liststring>>();
            EnumWindows((hWnd, lPam) =>
            {
                if (!IsAltTabWindow(hWnd)) return true;//继续枚举
                var title = GetWindowTitle(hWnd);
                handles.Add(new KeyValuePairstring>(hWnd, title));
                return true;//继续枚举
            }, IntPtr.Zero);

            EnumChildWindows(GetDesktopWindow(), (hWnd, lPam) =>
            {
                if (handles.Any(kv => kv.Key == hWnd)||!IsFullScreenUwpWindows(hWnd)) return true;//继续枚举
                var title = GetWindowTitle(hWnd);
                handles.Add(new KeyValuePairstring>(hWnd, title));
                return true;//继续枚举
            }, IntPtr.Zero);







[DllImport("user32.dll")]
        public static extern IntPtr GetDesktopWindow();
/// 

        /// 获取窗体的名称
        /// 
        /// 
        /// 
        /// 
        /// 
        [DllImport("user32.dll")]
        public static extern int GetWindowTextW(IntPtr hWnd, IntPtr lpString, int nMaxCount);

/// 

        /// 默认获取字符串的长度
        /// 
        private const int NumChars = 256;
        public static string GetWindowTitle(IntPtr hwnd)
        {
            IntPtr intPtr = Marshal.AllocHGlobal(NumChars);
            Utils.Win32Api.GetWindowTextW(hwnd, intPtr, 100);
            var s = Marshal.PtrToStringUni(intPtr);
            Marshal.FreeHGlobal(intPtr);
            return s;
        }

以上代码需要做调整才能运行起来，有空我补上完整代码

参考：https://stackoverflow.com/questions/72069771/show-a-list-of-all-alttab-windows-even-full-screen-uwp-windows-and-retrieve